1/2" Branch Copper Manifolds Copper manifolds are available in five styles‚ with or without ball valves. The ends of the manifold trunks are either open‚ closed‚ or supplied with 3/4" crimp fittings. Manifolds are made of type “L” copper. All fittings are brass and are brazed to the copper trunk. Order copper CrimpRings™ separately.